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		<h1>简易计算器的制作</h1><hr>
		<form action="J.jsp" method="post">
		第一个数:&nbsp;&nbsp;<input type="text" name="num1"><br>
		第二个数:&nbsp;&nbsp;<input type="text" name="num2"><br>
		&nbsp;&nbsp;操作类型:<select name="type">
						  <option name="+">+</option>
						  <option name="-">-</option>
						  <option name="*">*</option>
						  <option name="*">/</option>
						   </select>&nbsp;&nbsp;
	  <input type="submit" value="提交"><br>
		</form>
		</div>
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